i just finished converting an old module from jobberBase 1.8 to 1.9.1 to allow email subscriptions for new jobs posted, New Jobs Email Subscription for jobberBase v1.9.1

features:
- applicants can subscribe to any of the categories
- applicant must confirm email address before getting notifications (to avoid bogus email addresses)
- automatic notification will be sent to the subscriber whenever a new job is posted for that job’s category
- on the notification sent to the subscribers, an unsubscribe link is provided in case users no longer want to receive emails for that job category
- new jobs email alert does not get sent until the job has been approved by the admin or the job poster’s email address has been previously approved (to avoid spamming)

read more:
http://www.redjumpsuit.net/2011/02/20/n … ase-1-9-1/